From a65375c3e35b150e764658532923cb36a85d3e9e Mon Sep 17 00:00:00 2001
From: Fred Drake <fdrake@acm.org>
Date: Wed, 1 May 2002 03:31:42 +0000
Subject: Explain what os.read() returns at end of file. This closes SF bug
 #550409.  Applying to release21-maint & release22-maint.

---
 Doc/lib/libos.tex | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index 834e562..c956ab1 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -471,7 +471,9 @@ Availability: \UNIX, Windows.
 
 \begin{funcdesc}{read}{fd, n}
 Read at most \var{n} bytes from file descriptor \var{fd}.
-Return a string containing the bytes read.
+Return a string containing the bytes read.  If the end of the file
+referred to by \var{fd} has been reached, an empty string is
+returned.
 Availability: Macintosh, \UNIX, Windows.
 
 Note: this function is intended for low-level I/O and must be applied
-- 
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